Unstable Cavitation Behavior in a Circular-Cylindrical Orifice Flow.

Sato, Keiichi; Saito, Yasuhiro

doi:10.1299/jsmeb.45.638

Cited by 64 publications

(60 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Wright et al (2013) characterized the form of water jets for submerged nozzles in quiescent waters. Visual description of cavitating pattern is given for orifices in pipes via shadow-graphic imaging by Sato and Saito (2002), Mishra and Peles (2005a) and Rooze et al (2012) in a wide range of process parameters and geometrical variations.…”

Section: Introductionmentioning

confidence: 99%

High-pressure emulsion formation in cylindrical coaxial orifices: Influence of cavitation induced pattern on oil drop size

Schlender

Spengler

Schuchmann

2015

International Journal of Multiphase Flow

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

High-pressure emulsion formation in cylindrical coaxial orifices: Influence of cavitation induced pattern on oil drop size

Schlender

Spengler

Schuchmann

2015

International Journal of Multiphase Flow

View full text Add to dashboard Cite

“…figure 1), as CN is progressively reduced [58] -incipient cavitation occurs as soon as cavitation starts at the nozzle entrance; -the developed cavitation regime is constituted by an early sub-cavitation stage, in which the vapour tends to fill the separation region of axial extension L sep (cf. figure 1) as CN diminishes (CN has little effect on L cav in this sub-regime), and by a further transitional cavitation sub-regime, in which L cav extends significantly downstream from the vena contracta as CN diminishes, and -supercavitation occurs when the cavity length develops up to or close to the nozzle exit (L cav → L): the liquid core in this regime is surrounded by a vapour cloud, which can eventually fill the whole nozzle and make the liquid core disappear.…”

Section: Different Hydrodynamic Cavitation Regimes In Nozzlesmentioning

confidence: 99%

“…However, the shape of the cavitation structures, during the deep transitional regime and the supercavitation regime, depends on the nozzle geometry to a significant extent. The high-speed photography of supercavitation flows [58] has revealed their unsteady and unstable nature. As soon as the flow starts to enter the supercavitation regime, a rapid collapse of the cavitation pockets can occur between the liquid core and the walls, according to a re-entrant jet mechanism [59].…”

Section: Different Hydrodynamic Cavitation Regimes In Nozzlesmentioning

confidence: 99%

“…It is also of interest, from the supercavitation instability point of view, to recall that, once the vapour fixed cavity reaches about 25-35% of nozzle length L [58,62], the point of cavity reattachment can move instantly at the nozzle exit, and can thus suddenly enter the supercavitation regime. This is illustrated in figure 3, where the L cav versus CN curve exhibits a vertical inflection point between transitional cavitation and supercavitation.…”

Section: Different Hydrodynamic Cavitation Regimes In Nozzlesmentioning

confidence: 99%

See 1 more Smart Citation

Fluid dynamics of acoustic and hydrodynamic cavitation in hydraulic power systems

Ferrari¹

2017

Proc. R. Soc. A.

View full text Add to dashboard Cite

Cavitation is the transition from a liquid to a vapour phase, due to a drop in pressure to the level of the vapour tension of the fluid. Two kinds of cavitation have been reviewed here: acoustic cavitation and hydrodynamic cavitation. As acoustic cavitation in engineering systems is related to the propagation of waves through a region subjected to liquid vaporization, the available expressions of the sound speed are discussed. One of the main effects of hydrodynamic cavitation in the nozzles and orifices of hydraulic power systems is a reduction in flow permeability. Different discharge coefficient formulae are analysed in this paper: the Reynolds number and the cavitation number result to be the key fluid dynamical parameters for liquid and cavitating flows, respectively. The latest advances in the characterization of different cavitation regimes in a nozzle, as the cavitation number reduces, are presented. The physical cause of choked flows is explained, and an analogy between cavitation and supersonic aerodynamic flows is proposed. The main approaches to cavitation modelling in hydraulic power systems are also reviewed: these are divided into homogeneous-mixture and twophase models. The homogeneous-mixture models are further subdivided into barotropic and baroclinic models. The advantages and disadvantages of an implementation of the complete Rayleigh-Plesset equation are examined.

show abstract

“…Furthermore, the relationship between cavitation noise and its morphological characteristics was studied. In Sato and Saito's research on orifice cavitation [6], the similar method was taken. Orifices with different lengths and diameters were studied.…”

mentioning

confidence: 99%

Investigation on Cavitation Behavior and Noise in Hydraulic Values

et al. 2008

Proceedings of the JFPS International Symposium on Fluid Power

View full text Add to dashboard Cite

Cavitationsinside hydraulic valves were investigated by using high-speed camera technology and noise spectrum analyzing method. The bubble flow's morphological and flowing characteristics were converted into numerical information by the employment of image process, which made the two-phase flow easily identifiable . Based on this, cavitation's distribution and shape characteristics were revealed. Combined with cavitation noise spectrum analyzing, it was found that the shedding process of cavitation had similar high frequency properties with cavitation noise spectrums .Typical noise curves of cavitations were obtained, and the second peak levels were found in low cavitation number conditions.In addition, it assumed that, the shedding frequencies played a good reflection to cavitation noise while using cavitation numbers as the only variable.

show abstract

Unstable Cavitation Behavior in a Circular-Cylindrical Orifice Flow.

Cited by 64 publications

References 11 publications

High-pressure emulsion formation in cylindrical coaxial orifices: Influence of cavitation induced pattern on oil drop size

High-pressure emulsion formation in cylindrical coaxial orifices: Influence of cavitation induced pattern on oil drop size

Fluid dynamics of acoustic and hydrodynamic cavitation in hydraulic power systems

Investigation on Cavitation Behavior and Noise in Hydraulic Values

Contact Info

Product

Resources

About